Piston-ring



A. K. SCHAAP.

PISTON RING.

APPLICATION FILED APR. 3. 1920.

1 ,381,668. Patented June 14, 1921..

Fig.1.

Z 5 4 m- 1 5 Fig.4;

avwawto o nnnxennnn n. so, or new roan, n. Y.

PISTON=RING-.

Application filed April 3,

To all whom it may concern.

Be it known that I, ALEXANDER K. SCHAAP, a citizen of the United States, and a resident of the city of New York, county of Kings, and State of New York, have invented a new and useful Improvement in Piston-Rings, of which the following is a specification.

The object of my invention is to provide a one piece piston ring which will always fit with a tight joint and never bind or break.

This is accomplished by taking two outs on each side of the ring, each out going half way through in such a manner that the extenor perlpheral edges come together before the interior peripheral edges so that when the ring is compressed, the interior edges never met, and therefore, to make these cuts so that one extends in a diagonal direction with regard to the other. This object is accomplished by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more particular description of my invention, reference is to [be had to the accompanying drawing, forming a parthereof in which- Figure 1 is a plan view of my improved rm ig. 2 is an enlarged plan view of one side of the joint of the same.

Fig. 3 is an inverted plan view of the same joint thatis shown in Fig.2.

Fig. 4 is a side elevation of the joint, and

Figs. 5 and 6 show op site ends of the ring, one end (being at car: side of the joint.

Throughout the various views of the drawing, similar reference characters designate similar parts.

My improved ring 1 is generally made with substantially four cuts which will be designated by the edge walls which remain after th cut is taken. The first edge is designated 2 and for the want of a better term may be called a short cut, because it is not as long as the opposing cut 3 which is opposite the same. It will be noted that the outer ends of the edges 2 and 3 more nearly approach each other than the inner and that it is apparent from Fig. 4 that each of these cuts extends substantially half the thickness of the ring 1. After the cuts are made which produce the edges 2 and 3, the ring is turned over and two more cuts 4 and Specification of Letters Patent.

Patented June 14, 1921.

1920. Serial No. 371,016.

the piston ring when thering is in use, its

presence is immaterial.

It will 'be noted that the cuts 2, 3, 4 and 5 form ends which interlock so that one cannot ride in on another to any great extent and when the rin is in use in a piston, the irregularities of t e cylinder will cause the plston ring to expand and contract as the piston. rises and falls. This expansion and contraction of the ring causes the opposing cuts 2 and 3 on the one cylinder and 4 and 5 on the other to approach and recede as they approach by capillary action. The excess liquid is forced to the interior of the ring because the exterior ends are closer together than the interior so that this ring in the piston acts as a capillary pump to draw oil from the entire exterior periphery of the ring and force the same in the groove of the piston and back of the iston ring so that there is always a gentile hydraulic pressure of the ring against the cylinder wall which is equally radial and applied along the entire periphery so that as the ring wears in the cylinder it wears the cylinder true and in round and not out of round. Furthermore, when an explosion takes place above the piston and drives the same, the

piston drives the ring in the cylinder so that th ring is against the upper wall of the groove and slightly away from the lower wall of the groove and at that time, ifthere is any excess oil atthe interior of the ring, it has a chance to escape equally all around the interior wall of the cylinder and While so escaping it thoroughly lubricates I the cylinder just ahead of the power stroke of the engine. This is the time when perfect lubrication is required most and it is at the very time which the ring causes the lubrication This ring may be applied in any suitable engine but is designed for an ordinary piston of an internal combustion engine where the cylinder is lubricated by the splash of the crank in the crank case.

bodiment of my invention, it is obvious that g p menses it is not restricted thereto, but is broad e'dges being so arralnged and disposed that 10 enough to cover all structures that come one part runs aoross the other part, and

within the soope of the annexed claim. these edges have a quadrilateral in common Having thus described my invent1on,whet and ad acent edges on o posite ends ap- I claim is: proaoh each other more cYosely at the ex- A singlepiece piston ring haying an overterior periphery of the ring then at the in- 15 lapping 'oint and provided w1th two edges terior periphery. one over enging the other and longer than the other, at each side of the ring, the said ALEXANDER K. SOHAAP. 

